EP0152635A1 - Method of simulating image outlines for a pilot training at a simulator or a real vehicle - Google Patents

Method of simulating image outlines for a pilot training at a simulator or a real vehicle Download PDF

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Publication number
EP0152635A1
EP0152635A1 EP84200217A EP84200217A EP0152635A1 EP 0152635 A1 EP0152635 A1 EP 0152635A1 EP 84200217 A EP84200217 A EP 84200217A EP 84200217 A EP84200217 A EP 84200217A EP 0152635 A1 EP0152635 A1 EP 0152635A1
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EP
European Patent Office
Prior art keywords
simulated
real
detectable
vehicle
points
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84200217A
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German (de)
French (fr)
Inventor
Gilbert Jules Florent Burny
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Umicore NV SA
Original Assignee
Ateliers de Constructions Electriques de Charleroi SA
ACEC SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Ateliers de Constructions Electriques de Charleroi SA, ACEC SA filed Critical Ateliers de Constructions Electriques de Charleroi SA
Priority to EP84200217A priority Critical patent/EP0152635A1/en
Priority to JP60023355A priority patent/JPS60247681A/en
Publication of EP0152635A1 publication Critical patent/EP0152635A1/en
Withdrawn legal-status Critical Current

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/003D [Three Dimensional] image rendering
    • G06T15/10Geometric effects
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B9/00Simulators for teaching or training purposes
    • G09B9/02Simulators for teaching or training purposes for teaching control of vehicles or other craft
    • G09B9/04Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of land vehicles
    • G09B9/05Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of land vehicles the view from a vehicle being simulated
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B9/00Simulators for teaching or training purposes
    • G09B9/02Simulators for teaching or training purposes for teaching control of vehicles or other craft
    • G09B9/08Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
    • G09B9/30Simulation of view from aircraft
    • G09B9/301Simulation of view from aircraft by computer-processed or -generated image
    • G09B9/302Simulation of view from aircraft by computer-processed or -generated image the image being transformed by computer processing, e.g. updating the image to correspond to the changing point of view

Definitions

  • the present invention relates to a method for simulating images of various configurations, for example presenting an obstacle, a danger, a goal to be pursued or another interest for a driver of a vehicle represented by a training simulator.
  • the invention is applicable, for example, to stationary training simulators for aircraft, boats, battle tanks, etc.
  • the simulation method according to the invention can also be used for example even on a fighter aircraft in real flight for figuration , simulated obstacles, dangers or goals to pursue.
  • the configurations which are the subject of the simulation method according to the invention can be, for example, mountains appearing in the direct field of vision of a fixed station installation or on a screen of simulated vision of a fighter aircraft.
  • Another example is a school of fish to be chased by a boat whose image appears on a sonar screen.
  • a third example is a set of hail zones during a thunderstorm revealed on an aircraft radar screen.
  • the invention makes it possible to remedy this situation by a practically and economically feasible process.
  • the invention is based on the principle that the precise shape of the configurations to be simulated must resemble real configurations of the chosen nature, but it is sufficient that this resemblance is rough. In other words, a some stylization of the forms is tolerable.
  • the aim pursued by the invention is not to simulate the shape of a determined real configuration, but the behavior of the image, for example of a set of mountains when an airplane approaches, or bypasses or crosses these mountains at heights and on arbitrarily determined routes. These routes are determined by the commands handled by the pilot and possibly also according to the weather conditions which are taken into account when calculating the simulated route of an aircraft.
  • Figure 1 of this drawing shows an image on a radar screen.
  • FIG 1 Three hail zone centers are visible on a radar screen.
  • the coordinates of these three centers, as well as the parameters of a temperature distribution law around each of these centers are entered into a computer.
  • a detectable level is assumed to be an isothermal surface of for example + 2 ° C inside which there are hailstones, while outside there are only raindrops.
  • the computer provides an image isothermal surfaces + 2 ° C on a radar simulation screen according to the position of the aircraft with respect to these areas and calculates in real time, based on the manipulation of the aircraft or simulator controls airplane by the pilot, the variation of the images of these areas.
  • the computer calculation can also take into account the regular or gusty winds to which the airplane is exposed to determine its position relative to the hail centers. It is also possible to take account of the natural speed of these zones, which is determined by the natural speed of the centers by continuously varying the coordinates of the absolute positions of these centers. In addition, it is possible to simulate the slow dissolution over time of hail zones. This can be obtained by means of a variation of the parameters of the distribution laws, in this case the temperature.
  • each center requires the fixing of three coordinates: the center and, for example, two parameters of the temperature distribution law (T exp (t / r 2 )), r being the distance from an isothermal surface of the center, t and T being parameters.
  • T exp the temperature distribution law
  • r the distance from an isothermal surface of the center
  • t and T being parameters.
  • the number of data to be entered is therefore very modest and the necessary calculations are simple and quick to perform. It is thus easily possible to operate a display in real time, even with a poorly performing computer.
  • the size of the computer does not have to be large because a memory of 16 Mbytes can already be is more than enough.
  • the representation of a topographic configuration requires greater computing power and therefore a more efficient computer, if the display is to be done in real time.
  • a large number of vertex coordinates peak vertices, line vertices at constant height, inclined planes, etc.
  • level lines equidistant level lines, level lines with enlarging or narrowing spacings, etc.
  • a complicated mountain configuration can then be obtained by overlapping the simple elements. It is also possible to then calculate, for example the contours of the mountainous region and display, for example, the smallest distance between the plane and the mountain surface closest to the plane.
  • This last display can be encrypted and it is understood that the encrypted display of data is also called here "image of a detectable condition".

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Computer Graphics (AREA)
  • Processing Or Creating Images (AREA)

Abstract

The method involves making an arbitrary choice, taking into account the range of variation in a real outline, of the coordinates of one or more highest points or centres of a set of simulated outlines. For each of these points, an arbitrary choice is made of a law for the variation of a quantity for which at least one level or one condition is detectable. The data defining the coordinates of these highest points or centres (with respect to the real or simulated vehicle), the parameters of the laws and the detectable levels or conditions, are all fed into a computer. Images of the detectable levels or conditions for the simulated outlines are displayed in real time in the real or simulated vehicle. <IMAGE>

Description

La présente invention a pour objet un procédé de simulation d'images de configurations diverses, par exemple présentant un obstacle, un danger, un but à poursuivre ou un autre intérêt pour un pilote d'un véhicule représenté par un simulateur d'entraînement.The present invention relates to a method for simulating images of various configurations, for example presenting an obstacle, a danger, a goal to be pursued or another interest for a driver of a vehicle represented by a training simulator.

L'invention est applicable par exemple aux simulateurs d'entraînement à station fixe d'avion, de bateau, de char de combat, etc. Toutefois, comme l'installation mettant en oeuvre le procédé suivant l'invention ne nécessite pas un matériel lourd et encombrant, le procédé de simulation suivant l'invention peut être utilisé aussi par exemple même sur un avion de chasse en vol réel pour la figuration,simulée d'obstacles, de dangers ou de buts à poursuivre.The invention is applicable, for example, to stationary training simulators for aircraft, boats, battle tanks, etc. However, as the installation implementing the method according to the invention does not require heavy and bulky equipment, the simulation method according to the invention can also be used for example even on a fighter aircraft in real flight for figuration , simulated obstacles, dangers or goals to pursue.

Les configurations, objet du procédé de simulation suivant l'invention, peuvent être, par exemple, des montagnes apparaissant dans le champ de vision directe d'une installation à station fixe ou sur un écran de vision simulée d'un avion de chasse. Un autre exemple est un banc de poissons à poursuivre par un bateau dont l'image apparaît sur un écran de sonar. Un troisième exemple est un ensemble de zones de grêle au cours d'un orage révélé sur un écran de radar d'un avion.The configurations which are the subject of the simulation method according to the invention can be, for example, mountains appearing in the direct field of vision of a fixed station installation or on a screen of simulated vision of a fighter aircraft. Another example is a school of fish to be chased by a boat whose image appears on a sonar screen. A third example is a set of hail zones during a thunderstorm revealed on an aircraft radar screen.

Il est déjà connu d'utiliser dans des simulateurs des films ou découpes de films représentant l'aspect de configurations montagneuses obtenues lors d'un vol antérieur suivant-un trajet à travers ces montagnes. Cependant, dans un tel cas, il n'est pas possible de montrer l'aspect variable des montanges selon un trajet arbitraire, mais seulement selon le même trajet que celui de l'avion ayant porté la caméra lors des prises de vues. D'autre part, il n'est pas concevable, pratiquement et économiquement, de reconstituer point par point une configuration géographique réelle et d'en montrer les aspects variables selon un trajet arbitraire simulé d'un avion.It is already known to use films or film cutouts in simulators representing the appearance of mountainous configurations obtained during a previous flight following a journey through these mountains. However, in such a case, it is not possible to show the variable aspect of the mountains according to an arbitrary path, but only according to the same path as that of the plane having carried the camera during the shots. On the other hand, it is not conceivable, practically and economically, to reconstruct point by point a real geographic configuration and to show its variable aspects according to an arbitrary simulated path of an airplane.

L'invention permet de porter remède à cette situation par un procédé réalisable pratiquement et économiquement. L'invention est basée sur le principe que la forme précise des configurations à simuler doit ressembler à des configurations réelles de la nature choisie, mais il suffit que cette ressemblance soit grossière. En d'autres mots, une certaine stylisation des formes est tolérable. En effet, le but poursuivi par l'invention n'est pas de simuler la forme d'une configuration réelle déterminée, mais le comportement de l'image, par exemple d'un ensemble de montagnes lorsqu'un avion approche, ou contourne ou traverse ces montagnes à des hauteurs et selon des trajets déterminés arbitrairement. Ces trajets sont déterminés par les commandes manipulées par le pilote et éventuellement en fonction aussi des conditions météorologiques dont on tient compte lors du calcul du trajet simulé d'un avion. Dans ce cas, peu importe les formes précises ou fortement stylisées des montagnes simulées apparaissant dans le champ de vision du simulateur, pourvu qu'elles soient suffisamment imprévues. L'exercice de vol à travers ces montagnes simulées consiste à ne pas les approcher de trop près comme c'est le cas avec des montagnes d'autres formes, imprévues elles aussi, dans la réalité.The invention makes it possible to remedy this situation by a practically and economically feasible process. The invention is based on the principle that the precise shape of the configurations to be simulated must resemble real configurations of the chosen nature, but it is sufficient that this resemblance is rough. In other words, a some stylization of the forms is tolerable. Indeed, the aim pursued by the invention is not to simulate the shape of a determined real configuration, but the behavior of the image, for example of a set of mountains when an airplane approaches, or bypasses or crosses these mountains at heights and on arbitrarily determined routes. These routes are determined by the commands handled by the pilot and possibly also according to the weather conditions which are taken into account when calculating the simulated route of an aircraft. In this case, it does not matter the precise or highly stylized forms of the simulated mountains appearing in the field of vision of the simulator, provided that they are sufficiently unforeseen. The flight exercise through these simulated mountains consists in not approaching them too closely as is the case with mountains of other forms, also unforeseen, in reality.

Suivant l'invention, on choisit arbitrairement, en tenant compte du domaine de variation d'une configuration réelle, les coordonnées d'un ou plusieurs points culminants ou centres d'un ensemble de configurations simulées et pour chacun de ces points une loi de variation d'une grandeur dont au moins un niveau ou une condition est détectable, qu'on introduit dans un ordinateur les données définissant, par rapport au véhicule réel ou simulé les coordonnées de ces points culminants ou centres et les paramètres des lois et des niveaux ou conditions détectables et qu'on calcule et affiche dans le véhicule réel ou simulé, en temps réel, les images des niveaux ou conditions détectables des configurations simulées.According to the invention, one arbitrarily chooses, taking into account the range of variation of a real configuration, the coordinates of one or more culminating points or centers of a set of simulated configurations and for each of these points a law of variation of a quantity of which at least one level or condition is detectable, whether the data defining, relative to the real or simulated vehicle, the coordinates of these culminating points or centers and the parameters of the laws and levels are entered into a computer detectable conditions and calculate and display in the real or simulated vehicle, in real time, the images of the detectable levels or conditions of the simulated configurations.

L'invention est décrite ci-dessous par rapport à quelques exemples de formes d'exécution en se référant au dessin annexé.The invention is described below in relation to some examples of embodiments with reference to the accompanying drawing.

La figure 1 de ce dessin montre une image sur un écran de radar.Figure 1 of this drawing shows an image on a radar screen.

A la figure 1, trois centres de zones de grêle sont visibles sur un écran de radar. Les coordonnées de ces trois centres, ainsi que les paramètres d'une loi de répartition de température autour de chacun de ces centres sont introduits dans un ordinateur. Un niveau détectable est supposé être une surface isothermique de par exemple + 2° C à l'intérieur de laquelle il existe des grelons, tandis qu'à l'extérieur il n'existe que des gouttes de pluie. Or, en réalité la zone de grelons est détectable par une installation de radar. L'ordinateur fournit une image des surfaces isothermiques + 2° C sur un écran de simulation de radar en fonction de la position de l'avion par rapport à ces zones et calcule en temps réel, en fonction de la manipulation des commandes de l'avion ou du simulateur d'avion par le pilote, la variation des images de ces zones. Le calcul de l'ordinateur peut tenir compte en outre des vents réguliers ou en rafale auxquels est exposé l'avion pour déterminer la position de ce dernier par rapport aux centres de grêle. Il est possible de tenir compte aussi de la vitesse propre de ces zones, qui est déterminée par la vitesse propre des centres en variant de manière continue les coordonnées des positions absolues de ces centres. En outre, il est possible de simuler la dissolution lente au cours du temps des zones de grêle. Ceci peut être,obtenu au moyen d'une variation des paramètres des lois de répartition, en l'occurence de la température.In Figure 1, three hail zone centers are visible on a radar screen. The coordinates of these three centers, as well as the parameters of a temperature distribution law around each of these centers are entered into a computer. A detectable level is assumed to be an isothermal surface of for example + 2 ° C inside which there are hailstones, while outside there are only raindrops. However, in reality the area of hailstones is detectable by a radar installation. The computer provides an image isothermal surfaces + 2 ° C on a radar simulation screen according to the position of the aircraft with respect to these areas and calculates in real time, based on the manipulation of the aircraft or simulator controls airplane by the pilot, the variation of the images of these areas. The computer calculation can also take into account the regular or gusty winds to which the airplane is exposed to determine its position relative to the hail centers. It is also possible to take account of the natural speed of these zones, which is determined by the natural speed of the centers by continuously varying the coordinates of the absolute positions of these centers. In addition, it is possible to simulate the slow dissolution over time of hail zones. This can be obtained by means of a variation of the parameters of the distribution laws, in this case the temperature.

Il est à remarquer que chaque centre nécessite la fixation de trois coordonnées : le centre et de par exemple deux paramètres de la loi de répartition de température (T exp (t/r2)), r étant la distance d'une surface isothermique du centre, t et T étant des paramètres. Le nombre de données à introduire est donc très modeste et les calculs nécessaires sont simples et rapides à exécuter. Il est ainsi aisément possible d'opérer un affichage en temps réel, même avec un ordinateur peu performant. La taille de l'ordinateur ne doit pas être grand car une mémoire de 16 Mbytes peut déjà être est largement suffisant.It should be noted that each center requires the fixing of three coordinates: the center and, for example, two parameters of the temperature distribution law (T exp (t / r 2 )), r being the distance from an isothermal surface of the center, t and T being parameters. The number of data to be entered is therefore very modest and the necessary calculations are simple and quick to perform. It is thus easily possible to operate a display in real time, even with a poorly performing computer. The size of the computer does not have to be large because a memory of 16 Mbytes can already be is more than enough.

Il est de ce fait possible aussi de simuler de tels orages pendant un vol réel et d'afficher la situation de ces zones de grêle sur un écran de simulation de l'avion réel. En effet, l'ordinateur nécessaire peut être emporté aisément par un avion même de petite taille (avion de chasse).It is therefore also possible to simulate such thunderstorms during a real flight and to display the situation of these hail zones on a simulation screen of the real aircraft. Indeed, the necessary computer can be easily carried by even a small plane (fighter plane).

Des conditions très simples analogues existent aussi dans le cas de la représentation de bancs de poissons simulés sur un écran de sonar d'un bateau. (Fig.2).Very simple analogous conditions also exist in the case of the representation of schools of simulated fish on a sonar screen of a boat. (Fig. 2).

Par contre, la représentation d'une configuration topographique (Fig.3) nécessite une puissance de calcul plus importante et par conséquent un ordinateur plus performant, si l'affichage doit se faire en temps réel. Dans un tel cas, un grand nombre de coordonnées de sommets (sommets en pointe, sommets en ligne à hauteur constante, plans inclinés, etc) peuvent être données et autour de chacun de ces sommets une variation simple de lignes de niveau (lignes de niveau équidistantes, lignes de niveau à écartements agrandissants ou rétrécissants, etc). Une configuration montagneuse compliquée peut ensuite être obtenue au moyen de superpositions des éléments simples. Il est possible en outre de calculer ensuite, par exemple les contours de la région montagneuse et d'afficher par exemple la distance la plus petite entre l'avion et la surface de montagne la plus proche de l'avion. Ce dernier affichage peut être chiffré et il est entendu que l'affichage chiffré de données est aussi appelé ici "image d'une condition détectable".On the other hand, the representation of a topographic configuration (Fig. 3) requires greater computing power and therefore a more efficient computer, if the display is to be done in real time. In such a case, a large number of vertex coordinates (peak vertices, line vertices at constant height, inclined planes, etc.) can be given and around each of these vertices a simple variation of level lines (equidistant level lines, level lines with enlarging or narrowing spacings, etc.). A complicated mountain configuration can then be obtained by overlapping the simple elements. It is also possible to then calculate, for example the contours of the mountainous region and display, for example, the smallest distance between the plane and the mountain surface closest to the plane. This last display can be encrypted and it is understood that the encrypted display of data is also called here "image of a detectable condition".

Un autre exemple est la simulation de tourbillons dangereux tels que ceux appelés "wind shear". En donnant l'axe des tourbillons, leurs pieds au sol ou sur un avion, ainsi que leurs énergies, il est possible de calculer les rafales ou vents qu'ils engendrent et leurs influences sur un avion qui les aborde et traverse. Il s'agit là de conditions de vol extrêmement dangereuses pour lesquelles tout entraînement sauf sur un simulateur est exclu. Comme de telles situations ne sont pas détectables en vol réel au moyen des appareils actuellement connus et utilisés, l'affichage de ces conditions peut se faire sur un écran visible par l'instructeur seulement soit de manière chiffrée soit sous forme d'une image dont la présentation est à déterminer par convention.Another example is the simulation of dangerous vortices such as those called "wind shear". By giving the axis of the vortices, their feet on the ground or on an airplane, as well as their energies, it is possible to calculate the gusts or winds that they generate and their influences on an airplane that approaches and crosses them. These are extremely dangerous flight conditions for which all training except on a simulator is excluded. As such situations cannot be detected in real flight by means of the currently known and used devices, the display of these conditions can be done on a screen visible to the instructor only either in encrypted form or in the form of an image the presentation is to be determined by convention.

Claims (4)

1. Procédé de simulation d'images de configurations diverses présentant un intérêt pour un pilote d'un véhicule réel ou représenté par un simulateur,
caractérisé en ce qu'on choisit arbitrairement, en tenant compte du domaine de variation d'une configuration réelle, les coordonnées d'un ou de plusieurs points culminants ou centres d'un ensemble de configurations simulés et pour chacun de ces points, une loi de variation d'une grandeur dont au moins un niveau ou une condition est détectable, qu'on introduit dans un ordinateur les données définissant, par rapport au véhicule simulé, les coordonnées de ces points culminants ou centres et les paramètres des lois et des niveaux ou conditions détectables et qu'on calcule et affiche dans le véhicule réel ou simulé, en temps réel les images des niveaux ou conditions détectables des configurations simulées.
1. Method for simulating images of various configurations of interest for a pilot of a real vehicle or represented by a simulator,
characterized in that one arbitrarily chooses, taking into account the range of variation of a real configuration, the coordinates of one or more culminating points or centers of a set of simulated configurations and for each of these points, a law of variation of a quantity of which at least one level or a condition is detectable, that the data defining, with respect to the simulated vehicle, the coordinates of these culminating points or centers and the parameters of the laws and of the levels are entered or detectable conditions and calculate and display in the real or simulated vehicle, in real time the images of the detectable levels or conditions of the simulated configurations.
2. Procédé suivant la revendication 1, caractérisé en ce qu'on varie de manière continue la position absolue des dits points culminants ou centres en tenant compte du domaine des variations des vitesses propres des configurations simulées.2. Method according to claim 1, characterized in that the absolute position of said culminating points or centers is continuously varied taking into account the domain of the variations of the natural velocities of the simulated configurations. 3. Procédé suivant une des revendications précédentes, caractérisé en ce qu'on varie de manière continue un ou plusieurs paramètres des dites lois.3. Method according to one of the preceding claims, characterized in that one or more parameters of said laws are continuously varied. 4. Installation de simulation réalisant le procédé suivant une des revendications précédentes, caractérisé en ce qu'elle est commandée en fonction des commandes d'un véhicule simulé ou d'un véhicule réel.4. Simulation installation carrying out the method according to one of the preceding claims, characterized in that it is controlled as a function of the commands from a simulated vehicle or from a real vehicle.
EP84200217A 1984-02-20 1984-02-20 Method of simulating image outlines for a pilot training at a simulator or a real vehicle Withdrawn EP0152635A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP84200217A EP0152635A1 (en) 1984-02-20 1984-02-20 Method of simulating image outlines for a pilot training at a simulator or a real vehicle
JP60023355A JPS60247681A (en) 1984-02-20 1985-02-08 Sumilator or method of sumilating image with shape useful for operator of actual vehicle

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Application Number Priority Date Filing Date Title
EP84200217A EP0152635A1 (en) 1984-02-20 1984-02-20 Method of simulating image outlines for a pilot training at a simulator or a real vehicle

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EP0152635A1 true EP0152635A1 (en) 1985-08-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008312A1 (en) * 1992-10-01 1994-04-14 University Corporation For Atmospheric Research Virtual reality imaging system
CN110322747A (en) * 2018-03-30 2019-10-11 Cae有限公司 Dynamic modification includes the visual render for the visual element that the vision profile being associated is described

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996673A (en) * 1975-05-29 1976-12-14 Mcdonnell Douglas Corporation Image generating means
US4173081A (en) * 1978-03-14 1979-11-06 The Singer Company Video generator for use in a synthetic terrain generator
GB2030429A (en) * 1978-08-30 1980-04-02 Hitachi Electronics Graphical figure display devcie
GB2091979A (en) * 1981-01-27 1982-08-04 Secretary Industry Brit Generation of Boundaries on Raster Display

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996673A (en) * 1975-05-29 1976-12-14 Mcdonnell Douglas Corporation Image generating means
US4173081A (en) * 1978-03-14 1979-11-06 The Singer Company Video generator for use in a synthetic terrain generator
GB2030429A (en) * 1978-08-30 1980-04-02 Hitachi Electronics Graphical figure display devcie
GB2091979A (en) * 1981-01-27 1982-08-04 Secretary Industry Brit Generation of Boundaries on Raster Display

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008312A1 (en) * 1992-10-01 1994-04-14 University Corporation For Atmospheric Research Virtual reality imaging system
AU668425B2 (en) * 1992-10-01 1996-05-02 University Corporation For Atmospheric Research Virtual reality imaging system
CN110322747A (en) * 2018-03-30 2019-10-11 Cae有限公司 Dynamic modification includes the visual render for the visual element that the vision profile being associated is described
CN110322747B (en) * 2018-03-30 2023-05-30 Cae有限公司 Dynamically modifying visual rendering of visual elements including visual contour depictions associated therewith

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JPS60247681A (en) 1985-12-07

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